{"id":208167,"date":"2025-07-08T12:44:55","date_gmt":"2025-07-08T04:44:55","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208167\/"},"modified":"2025-07-08T12:44:55","modified_gmt":"2025-07-08T04:44:55","slug":"go-sdk-%e4%b8%ad%e7%9a%84-dynamodb-%e6%9f%a5%e8%af%a2-limit-1%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208167\/","title":{"rendered":"go sdk \u4e2d\u7684 DynamoDB \u67e5\u8be2 `–limit 1`\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> go sdk \u4e2d\u7684 DynamoDB \u67e5\u8be2 `–limit 1`\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-29 19:57:37<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u6765\u5230\u7684\u5927\u5bb6\uff0c\u76f8\u4fe1\u90fd\u662f\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5e0c\u671b\u5728\u8fd9\u91cc\u5b66\u4e60Golang\u76f8\u5173\u7f16\u7a0b\u77e5\u8bc6\u3002\u4e0b\u9762\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u5e26\u5927\u5bb6\u804a\u804a\u300ago sdk \u4e2d\u7684 DynamoDB \u67e5\u8be2 `–limit 1`\uff1f\u300b\uff0c\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

--limit 1<\/code> \u7684 go-sdk \u7b49\u6548\u9879\u662f\u4ec0\u4e48\uff1f<\/p>\n

\u6211\u53ef\u4ee5\u5728 cli \u4e2d\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n

aws dynamodb query \n  --table-name table_name\n    ...\n  --limit 1<\/pre>\n
\u6211\u4e0d\u786e\u5b9a\u5982\u4f55\u5728 go-sdk \u4e2d\u6267\u884c\u6b64\u64cd\u4f5c\uff0c\u6211\u5c1d\u8bd5\u4e86\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n
var parameter = &dynamodb.queryinput{\n    tablename: aws.string(\"table_name\"),\n    keyconditions: map[string]*dynamodb.condition{...},\n    setlimit: aws.string(\"1\"),\n}\nresponse, err := dyna.db.query(parameter)<\/pre>\n
\u7136\u540e\u6211\u9047\u5230\u4e86\u4e00\u4e2a\u9519\u8bef\uff0c\u4f8b\u5982\uff1a<\/p>\n
$ go test\n# _\/home\/test\/\n.\/test.go:48:11: unknown field 'SetLimit' in struct literal of type dynamodb.QueryInput<\/pre>\n
go-sdk\u4e2d--limit 1<\/code>\u7684\u6b63\u786e\u505a\u6cd5\u662f\u4ec0\u4e48\uff1f<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u5e94\u8be5\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n
limit: aws.int64(1),<\/pre>\n
\u5728\u8fd9\u91cc\u627e\u5230\uff1a <\/p>\n
\/\/ SetLimit sets the Limit field's value.\nfunc (s *QueryInput) SetLimit(v int64) *QueryInput {\n    s.Limit = &v\n    return s\n}<\/pre>\n
\u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8eGolang\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-208167","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208167","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=208167"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208167\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208167"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208167"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}